Added test_create_binding_target

Goals (incl. binding) are required to have targets
Plugin fixtures are available through accessors

app/models/goal.rb

@@ -8,7 +8,8 @@ class Goal < ActiveRecord::Base
 
   validates :target_exposures, presence: true
   validates :is_binding, uniqueness: {scope: :project_id}, if: :is_binding?
-  validates :name, presence: true, uniqueness: {scope: :project_id}
+  validates :name, presence: true, uniqueness: {scope: :project_id},
+    exclusion: {in: [I18n.t('targets.form.binding_goal')], unless: :is_binding?}
 
   after_initialize do
     if new_record?